LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 81576

Search options

  1. Article ; Online: Re: Lui H, Galbraith JG, Meyers K, Bindra R, Lee SK. Biomechanical analysis of three techniques of suspensionplasty after trapeziectomy: a cadaveric study. J Hand Surg Eur. 2023, doi:10.1177/17531934231186495.

    Ebner, Peggy / Kuschner, Stuart / Lui, Hayman / Galbraith, John G / Meyers, Kathleen / Bindra, Randy / Lee, Steve K

    The Journal of hand surgery, European volume

    2023  Volume 49, Issue 5, Page(s) 642–644

    MeSH term(s) Humans ; Trapezium Bone/surgery ; Biomechanical Phenomena ; Cadaver
    Language English
    Publishing date 2023-12-06
    Publishing country England
    Document type Letter
    ZDB-ID 2272801-6
    ISSN 2043-6289 ; 1753-1934
    ISSN (online) 2043-6289
    ISSN 1753-1934
    DOI 10.1177/17531934231217371
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article ; Online: Purely Spatial Quantum Diffusion of H Atoms in Solid H_{2} at Temperatures below 1 K.

    Sheludiakov, S / Lee, D M / Khmelenko, V V / Järvinen, J / Ahokas, J / Vasiliev, S

    Physical review letters

    2021  Volume 126, Issue 19, Page(s) 195301

    Abstract: ... films at T=0.7  K. We obtained a rate of pure spatial diffusion of H atoms in the H_{2} films, D^{d}=5(2 ... We report on a direct measurement of the quantum diffusion of H atoms in solid molecular hydrogen ... 10^{-17}  cm^{2} s^{-1}, which was 2 orders of magnitude faster than that obtained from H atom ...

    Abstract We report on a direct measurement of the quantum diffusion of H atoms in solid molecular hydrogen films at T=0.7  K. We obtained a rate of pure spatial diffusion of H atoms in the H_{2} films, D^{d}=5(2)×10^{-17}  cm^{2} s^{-1}, which was 2 orders of magnitude faster than that obtained from H atom recombination, the quantity used in all previous work to characterize the mobility of H atoms in solid H_{2}. We also observed that the H-atom diffusion was significantly enhanced by injection of phonons. Our results provide the first measurement of the pure spatial diffusion rate for H atoms in solid H_{2}, the only solid state system beside ^{3}He-^{4}He mixtures, where atomic diffusion does not vanish even at temperatures below 1 K.
    Language English
    Publishing date 2021-05-28
    Publishing country United States
    Document type Journal Article
    ZDB-ID 208853-8
    ISSN 1079-7114 ; 0031-9007
    ISSN (online) 1079-7114
    ISSN 0031-9007
    DOI 10.1103/PhysRevLett.126.195301
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Copper-Mediated Aminoquinoline-Directed Radiofluorination of Aromatic C-H Bonds with K

    Lee, So Jeong / Makaravage, Katarina J / Brooks, Allen F / Scott, Peter J H / Sanford, Melanie S

    Angewandte Chemie (International ed. in English)

    2019  Volume 58, Issue 10, Page(s) 3119–3122

    Abstract: A Cu-mediated ortho-C-H radiofluorination of aromatic carboxylic acids that are protected as 8 ... aminoquinoline benzamides is described. The method uses K ...

    Abstract A Cu-mediated ortho-C-H radiofluorination of aromatic carboxylic acids that are protected as 8-aminoquinoline benzamides is described. The method uses K
    MeSH term(s) Aminoquinolines/chemical synthesis ; Aminoquinolines/chemistry ; Benzamides/chemical synthesis ; Benzamides/chemistry ; Benzoates/chemical synthesis ; Benzoates/chemistry ; Copper/chemistry ; Fluorine Radioisotopes/chemistry ; Halogenation ; Humans ; Radiopharmaceuticals/chemical synthesis ; Radiopharmaceuticals/chemistry ; Receptors, Retinoic Acid/agonists ; Thiazoles/chemical synthesis ; Thiazoles/chemistry
    Chemical Substances 4-(4-(2-(n-butoxy)ethoxy)-5-methylthiazol-2-yl)-2-fluorobenzoic acid ; Aminoquinolines ; Benzamides ; Benzoates ; Fluorine Radioisotopes ; Radiopharmaceuticals ; Receptors, Retinoic Acid ; Thiazoles ; retinoic acid receptor beta ; Copper (789U1901C5) ; Fluorine-18 (GZ5I74KB8G) ; 8-aminoquinoline (U34EAV21TG)
    Language English
    Publishing date 2019-01-18
    Publishing country Germany
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    DOI 10.1002/anie.201812701
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Re: Lee, H.-J., Kim, P.-T., Jeon, I.-H., Kyung, H.-S., Ra, I.-H. and Kim, T.-K. Osteophyte excision without cyst excision for a mucous cyst of the finger. J Hand Surg Eur. 2014, 39: 258–61.

    Lee, H-J / Kim, P-T / Jeon, I-H / Kyung, H-S / Ra, I-H / Kim, T-K

    The Journal of hand surgery, European volume

    2014  Volume 39, Issue 8, Page(s) 907

    MeSH term(s) Female ; Fingers/surgery ; Ganglion Cysts/surgery ; Humans ; Male ; Osteophyte/surgery
    Language English
    Publishing date 2014-10
    Publishing country England
    Document type Comment ; Letter
    ZDB-ID 2272801-6
    ISSN 2043-6289 ; 1753-1934
    ISSN (online) 2043-6289
    ISSN 1753-1934
    DOI 10.1177/1753193414546990
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Book ; Online: Magnetic phase diagram of $A_{2}$[FeCl$_{5}$(H$_{2}$O)] ($A$ = K, Rb, NH$_{4}$)

    Lee, Minseong

    2021  

    Abstract: Erythrosiderites with the formula A2FeX5H2O, where A = Rb, K, and (NH4) and X = Cl and Br are ... structure is stabilized as observed in (K,Rb)2FeCl5H2O. We also show that the difference in the single-ion ...

    Abstract Erythrosiderites with the formula A2FeX5H2O, where A = Rb, K, and (NH4) and X = Cl and Br are intriguing systems that possess various magnetic and electric phases, as well as multiferroic phases in which magnetism and ferroelectricity are coupled. In this report, we study the magnetic phase diagram of erythrosiderites as a function of superexchange interactions. To this end, we perform classical Monte Carlo simulations on magnetic Hamiltonians that contain five different superexchange interactions with single-ion anisotropies. Our phase diagram contains all magnetic ground states that have been experimentally observed in these materials. We argue that the ground states can be explained by varying the ratio of J4/J2. For J4/J2 > 0.95 a cycloidal spins structure is stabilized as observed in (NH4)2FeCl5H2O and otherwise, a collinear spin structure is stabilized as observed in (K,Rb)2FeCl5H2O. We also show that the difference in the single-ion anisotropy along a- and c- axes is essential to stabilize the intermediate state observed in (NH)2FeCl5H2O.

    Comment: 8 pages, 6 figures, submitted
    Keywords Condensed Matter - Materials Science
    Subject code 612
    Publishing date 2021-03-15
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    More links

    Kategorien

  6. Article: Erratum: Lee, J.-H.; Kim, D.-K. Mapping Environmental Conflicts Using Spatial Text Mining. Land 2020, 9, 287

    Lee, Jae-hyuck / Kim, Do-Kyun

    Land. 2020 Nov. 05, v. 9, no. 11

    2020  

    Abstract: The authors would like to correct the following section of this paper [ ... ] ...

    Abstract The authors would like to correct the following section of this paper [...]
    Keywords administrative management ; air quality ; metropolitan areas ; South Korea
    Language English
    Dates of publication 2020-1105
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2682955-1
    ISSN 2073-445X
    ISSN 2073-445X
    DOI 10.3390/land9110434
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  7. Article: Pharmacological properties of the gastric H(+)/K(+) ATPase inhibitor, AU-461.

    Cheon, H G / Kim, H J / Mo, H K / Lee, B H / Choi, J

    Pharmacology

    2000  Volume 60, Issue 3, Page(s) 161–168

    Abstract: ... inhibited gastric H(+)/K(+) ATPase activities with IC(50) values of 12.15 and 4.20 micromol/l for rabbit and ... to the activating cation K(+). When AU-461 was examined for the in vivo antisecretory activity, we found that AU-461 ... of the antisecretory effect was about 6 h upon oral administration. AU-461 prevented dose-dependently the ulcer ...

    Abstract AU-461 (1-(2-methyl-4-methoxyphenyl)-4-[(2-hydroxyethyl)amino]-6-beta,beta, beta-trifluoroethoxy-2,3-dihydropyrrolo[3,2-c]quinoline) was tested for its ability to act as an anti-ulcer agent. AU-461 inhibited gastric H(+)/K(+) ATPase activities with IC(50) values of 12.15 and 4.20 micromol/l for rabbit and pig enzymes, respectively. The inhibition was reversible, and competitive with respect to the activating cation K(+). When AU-461 was examined for the in vivo antisecretory activity, we found that AU-461 reduced the histamine-stimulated acid secretion as well as the basal secretion in rat stomach. Duration of the antisecretory effect was about 6 h upon oral administration. AU-461 prevented dose-dependently the ulcer formation produced by either ethanol or NaOH. This protective effect was not altered by indomethacin pretreatment. In addition, the elevated plasma gastrin by the oral administration of AU-461 was returned to control by 12 h. Taken together, these results suggest that AU-461 could be developed as a new therapeutic agent for peptic ulcer disease.
    MeSH term(s) Animals ; Anti-Ulcer Agents/therapeutic use ; Enzyme Inhibitors/therapeutic use ; Gastric Acid/secretion ; Omeprazole/therapeutic use ; Proton Pump Inhibitors ; Rabbits ; Rats ; Stomach Ulcer/chemically induced ; Stomach Ulcer/drug therapy ; Swine
    Chemical Substances Anti-Ulcer Agents ; Enzyme Inhibitors ; Proton Pump Inhibitors ; Omeprazole (KG60484QX9)
    Language English
    Publishing date 2000-04
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 206671-3
    ISSN 1423-0313 ; 0031-7012
    ISSN (online) 1423-0313
    ISSN 0031-7012
    DOI 10.1159/000028361
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article ; Online: H(1) antihistamine drug promethazine directly blocks hERG K(+) channel.

    Jo, Su-Hyun / Hong, Hee-Kyung / Chong, Seon Ha / Lee, Hui Sun / Choe, Han

    Pharmacological research

    2009  Volume 60, Issue 5, Page(s) 429–437

    Abstract: Promethazine is a phenothiazine derivative with antihistaminic (H(1)), sedative, antiemetic ...

    Abstract Promethazine is a phenothiazine derivative with antihistaminic (H(1)), sedative, antiemetic, anticholinergic, and antimotion sickness properties that can induce QT prolongation, which may lead to torsades de pointes. Since block of cardiac human ether-a-go-go-related gene (hERG) channels is one of the leading causes of acquired long QT syndrome, we investigated the acute effects of promethazine on hERG channels to determine the electrophysiological basis for its proarrhythmic potential. Promethazine increased the action potential duration at 90% of repolarization (APD(90)) in a concentration-dependent manner, with an IC(50) of 0.73microM when action potentials were elicited under current clamp in guinea pig ventricular myocytes. We examined the effects of promethazine on the hERG channels expressed in Xenopus oocytes and HEK293 cells using two-microelectrode voltage-clamp and patch-clamp techniques. Promethazine induced a concentration-dependent decrease of the current amplitude at the end of the voltage steps and hERG tail currents. The IC(50) of promethazine dependent hERG block in Xenopus oocytes decreased progressively relative to the degree of depolarization. The IC(50) for the promethazine-induced block of the hERG currents in HEK293 cells at 36 degrees C was 1.46microM at +20mV. Promethazine affected the channels in the activated and inactivated states but not in the closed states. The S6 domain mutations, Y652A and F656A partially attenuated (Y652A) or abolished (F656A) the hERG current block. These results suggest that promethazine is a blocker of the hERG channels, providing a molecular mechanism for the arrhythmogenic side effects during the clinical administration of promethazine.
    MeSH term(s) Action Potentials/drug effects ; Animals ; Cell Line ; Ether-A-Go-Go Potassium Channels/antagonists & inhibitors ; Ether-A-Go-Go Potassium Channels/genetics ; Ether-A-Go-Go Potassium Channels/metabolism ; Female ; Guinea Pigs ; Histamine H1 Antagonists/pharmacology ; Humans ; Mutation ; Myocytes, Cardiac/drug effects ; Oocytes/metabolism ; Potassium Channel Blockers/pharmacology ; Promethazine/pharmacology ; Xenopus laevis/metabolism
    Chemical Substances Ether-A-Go-Go Potassium Channels ; Histamine H1 Antagonists ; Potassium Channel Blockers ; Promethazine (FF28EJQ494)
    Language English
    Publishing date 2009-11
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1003347-6
    ISSN 1096-1186 ; 0031-6989 ; 1043-6618
    ISSN (online) 1096-1186
    ISSN 0031-6989 ; 1043-6618
    DOI 10.1016/j.phrs.2009.05.008
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  9. Article ; Online: Promiscuous gating modifiers target the voltage sensor of K(v)7.2, TRPV1, and H(v)1 cation channels.

    Kornilov, Polina / Peretz, Asher / Lee, Yoonji / Son, Karam / Lee, Jin Hee / Refaeli, Bosmat / Roz, Netta / Rehavi, Moshe / Choi, Sun / Attali, Bernard

    FASEB journal : official publication of the Federation of American Societies for Experimental Biology

    2014  Volume 28, Issue 6, Page(s) 2591–2602

    Abstract: ... VGCCs to 2 structurally related nontoxin gating modifiers, NH17 and NH29, which stabilize K(v)7.2 ... in Chinese hamster ovary cells transfected with transient receptor potential vanilloid 1 (TRPV1) or K(v)7.2 channels ... that both compounds target the VSDs of TRPV1 channels, which, like vanilloids, are involved in π-π stacking, H-bonding ...

    Abstract Some of the fascinating features of voltage-sensing domains (VSDs) in voltage-gated cation channels (VGCCs) are their modular nature and adaptability. Here we examined the VSD sensitivity of different VGCCs to 2 structurally related nontoxin gating modifiers, NH17 and NH29, which stabilize K(v)7.2 potassium channels in the closed and open states, respectively. The effects of NH17 and NH29 were examined in Chinese hamster ovary cells transfected with transient receptor potential vanilloid 1 (TRPV1) or K(v)7.2 channels, as well as in dorsal root ganglia neurons, using the whole-cell patch-clamp technique. NH17 and NH29 exert opposite effects on TRPV1 channels, operating, respectively, as an activator and a blocker of TRPV1 currents (EC50 and IC50 values ranging from 4 to 40 μM). Combined mutagenesis, electrophysiology, structural homology modeling, molecular docking, and molecular dynamics simulation indicate that both compounds target the VSDs of TRPV1 channels, which, like vanilloids, are involved in π-π stacking, H-bonding, and hydrophobic interactions. Reflecting their promiscuity, the drugs also affect the lone VSD proton channel mVSOP. Thus, the same gating modifier can promiscuously interact with different VGCCs, and subtle differences at the VSD-ligand interface will dictate whether the gating modifier stabilizes channels in either the closed or the open state.
    MeSH term(s) Animals ; CHO Cells ; Cricetinae ; Cricetulus ; Diclofenac/analogs & derivatives ; Diclofenac/pharmacology ; Diphenylamine/analogs & derivatives ; Diphenylamine/pharmacology ; Ganglia, Spinal/drug effects ; Ganglia, Spinal/physiology ; Ion Channel Gating/drug effects ; Ion Channels/metabolism ; KCNQ2 Potassium Channel/metabolism ; Molecular Dynamics Simulation ; Patch-Clamp Techniques ; Rats ; TRPV Cation Channels/metabolism
    Chemical Substances Ion Channels ; KCNQ2 Potassium Channel ; NH17 compound ; NH29 compound ; TRPV Cation Channels ; Trpv1 protein, rat ; Diclofenac (144O8QL0L1) ; Diphenylamine (9N3CBB0BIQ)
    Language English
    Publishing date 2014-06
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 639186-2
    ISSN 1530-6860 ; 0892-6638
    ISSN (online) 1530-6860
    ISSN 0892-6638
    DOI 10.1096/fj.14-250647
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article ; Online: The Legs Have It: In Situ Expression of Ion Transporters V-Type H(+)-ATPase and Na(+)/K(+)-ATPase in the Osmoregulatory Leg Organs of the Invading Copepod Eurytemora affinis.

    Gerber, Lucie / Lee, Carol Eunmi / Grousset, Evelyse / Blondeau-Bidet, Eva / Boucheker, Nesrine Boudour / Lorin-Nebel, Catherine / Charmantier-Daures, Mireille / Charmantier, Guy

    Physiological and biochemical zoology : PBZ

    2016  Volume 89, Issue 3, Page(s) 233–250

    Abstract: ... were to localize and quantify expression of ion transport enzymes V-type H(+)-ATPase (VHA) and Na(+)/K ...

    Abstract The copepod Eurytemora affinis has an unusually broad salinity range, as some populations have recently invaded freshwater habitats independently from their ancestral saline habitats. Prior studies have shown evolutionary shifts in ion transporter activity during freshwater invasions and localization of ion transporters in newly discovered "Crusalis organs" in the swimming legs. The goals of this study were to localize and quantify expression of ion transport enzymes V-type H(+)-ATPase (VHA) and Na(+)/K(+)-ATPase (NKA) in the swimming legs of E. affinis and determine the degree of involvement of each leg in ionic regulation. We confirmed the presence of two distinct types of ionocytes in the Crusalis organs. Both cell types expressed VHA and NKA, and in the freshwater population the location of VHA and NKA in ionocytes was, respectively, apical and basal. Quantification of in situ expression of NKA and VHA established the predominance of swimming leg pairs 3 and 4 in ion transport in both saline and freshwater populations. Increases in VHA expression in swimming legs 3 and 4 of the freshwater population (in fresh water) relative to the saline population (at 15 PSU) arose from an increase in the abundance of VHA per cell rather than an increase in the number of ionocytes. This result suggests a simple mechanism for increasing ion uptake in fresh water. In contrast, the decline in NKA expression in the freshwater population arose from a decrease in ionocyte area in legs 4, likely resulting from decreases in number or size of ionocytes containing NKA. Such results provide insights into mechanisms of ionic regulation for this species, with added insights into evolutionary mechanisms underlying physiological adaptation during habitat invasions.
    MeSH term(s) Animals ; Copepoda/enzymology ; Copepoda/physiology ; Extremities/physiology ; Female ; Gene Expression Regulation, Enzymologic/physiology ; Male ; Osmoregulation/physiology ; Proton-Translocating ATPases/genetics ; Proton-Translocating ATPases/metabolism ; Salinity ; Sodium-Potassium-Exchanging ATPase/genetics ; Sodium-Potassium-Exchanging ATPase/metabolism ; Water-Electrolyte Balance
    Chemical Substances Proton-Translocating ATPases (EC 3.6.3.14) ; Sodium-Potassium-Exchanging ATPase (EC 3.6.3.9)
    Language English
    Publishing date 2016-05
    Publishing country United States
    Document type Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 1473845-4
    ISSN 1537-5293 ; 1522-2152
    ISSN (online) 1537-5293
    ISSN 1522-2152
    DOI 10.1086/686323
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

To top